body{
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
}


header{
    width: 100%;
    background-color: black;
    color: white;
    padding-bottom: 15px;
    top: 0;
    
}

header ul{
    padding: 0;
}

header li{
    list-style: none;

    margin-bottom: 15px;
}

header li a{
    color: white;
    text-decoration: none;
}

header li a:hover{
    text-decoration: underline;
}

#text_header{
    padding-left: 20px;
    padding-top: 20px;
}

/*AAAAAAAAAAAAAAAAaaaaaaeaaaaa*/

#hero{
    height: 400px;
}


#travaux_div{
    margin-left: 20px;
}

footer{
    bottom: 0;
    background-color: black;
    color: white;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 500px;

}

.bouton_travaux{
    color: black;
    text-decoration: none;


}

.logo_travaux{
    width: 50px;
    margin-right: 10px;
}

.travaux_ligne{
    display: flex;
    align-items: center;
    padding: 20px;
}

main{
    padding-left: 20px;
    
}

@media screen and (min-width:480px){ 
    header ul{
        list-style: none;
        margin: 0;
        padding: 0;
        text-align: center;
      }
      header li{
        display: inline-block;
        margin: 0 15px;
        
      }

      header a{
        font-size: 22px;
     
        text-decoration: none;
        color: #fff;
        display: block;
        position: relative;
        padding: 4px 0;
        
      }

      header li a:hover{
        text-decoration: none;
      }
      header a::before{
        content: "";
        width: 100%;
        height: 4px;
        position: absolute;
        left: 0;
        bottom: 0;
        background: #fff;
        transition: 0.5s transform ease;
        transform: scale3d(0,1,1);
        transform-origin: 0 50%;
      }
      header a:hover::before{
        transform: scale3d(1,1,1);
      }
      header a::before{
        background: #ffffff;
        transform-origin: 100% 50%;
      }
      header a:hover::before{
        transform-origin: 0 50%;
      }
 



    
}